Figure 113. Probe Coupling into a Waveguide.
b. Although probe coupling is used most often, we sometimes use loop-
coupling or slot-coupling just as with resonant cavities. Figure 114 shows
an example of loop coupling into a waveguide.
Figure 114.
Loop Coupling into a Waveguide.
c. Now let's see how energy is coupled out of waveguide.
The method
used depends upon the device to which the waveguide is coupled.
16. Waveguides are coupled to one of three devices.
a. The three principal uses of waveguide are as follows:
(1) Guiding energy to an antenna.
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